Microphone Directivity Switching for Recording Apparatus
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Solution Overview
Problem
Conventional recording apparatuses fail to adapt their control settings effectively when switched between being placed flat on a table and being fixed to a pocket, leading to inefficient sound collection due to differences in microphone directivity and placement stability.
Innovation Solution
The recording apparatus incorporates a first microphone with wide directivity on the front surface and a second microphone with narrower directivity on the rear surface, switching between them based on the device's orientation and state to optimize sound collection in various usage scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single microphone is used for recording, then the device structure is simple, but the sound collection efficiency deteriorates when the apparatus is fixed to a pocket
Solution Approach 1:
The recording apparatus divides the microphone system into two separate microphones with different directivity characteristics: a first microphone with wide directivity for general sound collection, and a second microphone with narrow directivity for focused sound collection. The system selectively activates the appropriate microphone based on the apparatus state, thereby optimizing sound collection efficiency without requiring a complex unified microphone structure.
Solution Approach 2:
The recording apparatus dynamically switches between the first and second microphones based on the detected state of the apparatus body (flat placement vs. pocket fixation). This dynamic adaptation allows the system to optimize sound collection efficiency for different usage scenarios without increasing structural complexity.
2Ease of operation
If the apparatus is fixed to a pocket, then portability is improved, but sound collection quality deteriorates due to unstable placement
Solution Approach 1:
The recording apparatus employs microphones with different local quality characteristics: the first microphone provides wide directivity for stable general sound collection when placed flat, while the second microphone provides narrow directivity for focused sound collection when fixed to a pocket. This local quality differentiation ensures reliable sound collection quality adapted to each placement scenario.
3Productivity
If wide directivity microphone is used, then sound collection coverage is improved, but noise interference increases when fixed to pocket
Solution Approach 1:
The system dynamically selects the appropriate microphone based on apparatus state. When fixed to a pocket, it switches to the second microphone with narrow directivity that reduces noise interference from surrounding areas. When placed flat, it uses the first microphone with wide directivity for comprehensive sound collection coverage.
Solution Approach 2:
The system changes the directivity parameter by switching between two microphones with different directivity characteristics. The first microphone has wide directivity for maximum coverage, while the second microphone has narrow directivity to minimize noise interference, allowing optimal parameter selection based on usage conditions.
Data Source
AI summary
According to the present invention, a recording apparatus includes an apparatus body having a front surface and a rear surface that constitute a front and a back, a first microphone which is placed in the front surface of the apparatus body and which has a predetermined directivity, a second microphone which is provided in the rear surface facing the front surface of the apparatus body and which has a directivity that is narrower than that of the first microphone, and a recording processing unit which switches a microphone for use in recording processing between the first microphone and the second microphone to perform the recording processing in accordance with the state of the apparatus body.